Up to 100 mm of rain will sweep across western Paraná and Rio Grande do Sul in less than 72 hours, with hail and gales of up to 100 km/h, while the same cold front that will drench the South pushes a polar air mass that drops temperatures to between 0°C and 4°C on Sunday, when frost covers the border with Uruguay and the most intense cold of the long weekend arrives after the rain departs.

Written by Valdemar Medeiros

Published on 03/05/2026 at 10:19

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INMET issues orange alert for Paraná and Rio Grande do Sul with intense rain, hail risk and winds of up to 100 km/h, while a cold front advances through the South and drops temperatures to 0°C to 4°C in Rio Grande do Sul areas, bringing frost risk right after the holiday weekend storms.

According to Agência Brasil, the National Institute of Meteorology issued two orange-level warnings, a danger classification, this Saturday, May 2, valid for 24 hours for Paraná and Rio Grande do Sul. The alert covers the Serrana, Southwest, Southeast, West, and Central-South regions of Paraná, in addition to areas of Rio Grande do Sul, with forecasts of intense rain and strong winds. The forecast indicates accumulations that can reach 60 millimeters per day and, punctually, exceed 100 millimeters in Rio Grande do Sul, with winds between 60 and 100 kilometers per hour. On Sunday, May 3, the advance of the cold front should allow the entry of a dry and cold air mass through Rio Grande do Sul, dropping minimums to values between 0°C and 4°C.

The sequence is harsh: first intense rain, with risk of hail and gales; then polar cold, when the sky clears and temperatures plummet. It’s the worst of both worlds concentrated in a single holiday weekend.

Cold front associated with extratropical cyclone reorganizes weather in Southern Brazil this weekend

The system that reorganizes the weather in Southern Brazil this weekend originates from a strong cold front, associated with an extratropical cyclone that began to organize over the Atlantic Ocean south of the continent. The system advanced through Rio Grande do Sul starting Friday, May 1st, at dawn.

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INMET issues orange alert for Paraná and Rio Grande do Sul with intense rain, hail risk and winds of up to 100 km/h, while a cold front advances through the South and drops temperatures to 0°C to 4°C in Rio Grande do Sul areas, bringing frost risk right after the holiday weekend storms.

Cold front associated with extratropical cyclone reorganizes weather in Southern Brazil this weekend

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INMET issues orange alert for Paraná and Rio Grande do Sul with intense rain, hail risk and winds of up to 100 km/h, while a cold front advances through the South and drops temperatures to 0°C to 4°C in Rio Grande do Sul areas, bringing frost risk right after the holiday weekend storms.

Cold front associated with extratropical cyclone reorganizes weather in Southern Brazil this weekend

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